Journal
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
Volume 36, Issue 3, Pages 512-521Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2008.09.001
Keywords
Vehicle to vehicle collision; Oblique impact; Energy loss; Residual crush measurement; Principal direction of deformation
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Since the seventies, many methodologies have been developed for estimating from energy loss the delta V produced in a vehicle to vehicle impact. Normal energy loss, is calculated by a discrete number of residual crush measurements in the direction parallel to the vehicle's axis, using the stiffness coefficients. in the case of oblique impact, a correction factor is applied to the normal energy loss to determine energy loss in the impulse direction. In this paper the concept of principal direction of deformation is introduced, presenting a new method for estimating energy loss in vehicle to vehicle collision, starting from a discrete number of crush measurements, which are, however, performed considering the effective displacement of the points during the crush. This novel approach, in addition to providing a more rigorous model of the physical phenomena, leads to improvement in the results: with the new approach, the mean error committed in estimating energy loss is about 10%, as compared to the 20% of the previous methodology. (C) 2008 Elsevier Ltd. All rights reserved.
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